#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QSqlDatabase>
#include <QSqlQuery>
#include <QSqlError>
#include "mysql.h"

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
    void sql_test(QString str);

public slots:
    void paintEvent(QPaintEvent *);
private slots:
    void on_pushButton_2_clicked();
    void on_pushButton_clicked();

private:
    Ui::MainWindow *ui;
    mysql * database;
    QSqlQuery query;
    int num_select;
};
#endif // MAINWINDOW_H
